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Updated: Apr 17, 2026
Focal Cerebral Ischemia Model by Endovascular Suture Occlusion of the Middle Cerebral Artery in the Rat
Published on: February 5, 2011
Comparison of surgical methods of transient middle cerebral artery occlusion between rats and mice
Seunghoon Lee1, Yunkyung Hong, Sookyoung Park
1Biohealth Products Research Center (BPRC), Inje University, Gimhae, Korea.
Abstract:
Rodent models of focal cerebral ischemia that do not require craniotomy have been developed by intraluminal suture middle cerebral artery occlusion (MCAo). Mouse MCAo models have been widely used and extended to genetic studies of cell death or recovery mechanisms. Therefore, we compared surgery-related parameters and techniques between such rats and mice. In rodent MCAo models, has to be considered body temperature during the operative period, as well as the need for the use of a standardized tip in terms of the outer diameter of probes. Induction of focal cerebral ischemia was measured by neurological dysfunction parameters. Our methods could induce stable moderate-severity ischemic brain injury models and histological alteration at 24 hr after MCAo surgery. Moreover approximately 80% (rats) and 85% (mice) survival ratios were shown indicating with model engineering success. Finally, we described and compared major parameters between rats and mice, including probe size, thread insert length, operation and occlusion periods, and differences in the procedures.
Insights
This study compares surgical techniques for inducing middle cerebral artery occlusion (MCAo) in rats and mice. Researchers optimized methods for stable ischemic brain injury, achieving high survival rates in both rodent models.
Area of Science:
- Neuroscience
- Surgical techniques
- Rodent models
Background:
- Intraluminal suture middle cerebral artery occlusion (MCAo) is a common method for inducing focal cerebral ischemia in rodents.
- Mouse MCAo models are widely used for genetic studies on cell death and recovery mechanisms.
Purpose of the Study:
- To compare surgical parameters and techniques for MCAo between rat and mouse models.
- To establish stable, moderate-severity ischemic brain injury models in both species.
Main Methods:
- Standardized intraluminal suture MCAo was performed on rats and mice.
- Key surgical parameters including probe size, thread insert length, and occlusion duration were optimized.
- Body temperature was carefully monitored during surgery.
- Neurological dysfunction and histological alterations were assessed 24 hours post-MCAo.
Main Results:
- Successful induction of stable, moderate-severity ischemic brain injury in both rats and mice.
- Achieved approximately 80% survival in rats and 85% in mice, indicating successful model engineering.
- Detailed comparison of surgical parameters and procedural differences between rat and mouse MCAo models.
Conclusions:
- The described methods enable the creation of reliable MCAo rodent models for studying ischemic stroke.
- Understanding species-specific surgical differences is crucial for consistent and reproducible research outcomes.
